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​Symptoms and Signs – Differential Diagnosis of Palpable Rectal Mass
• Amebic granuloma
• Diverticular phlegmon (prolapsing into the pouch of Douglas)
• Endometriosis
• Feces (indent)
• Foreign body
• Hypertrophied anal papilla
• Mesorectal lymph nodes
• Metastatic deposits at the pelvic reflection (Blumer’s shelf)
• Presacral cyst
• Primary pelvic malignant neoplasm (uterine, ovarian, prostatic, or cervical)
• Rectal carcinoma
• Rectal polyp
• Sigmoid colon carcinoma (prolapsing into the pouch of Douglas)
• Solitary rectal ulcer syndrome
• Vaginal tampon and even the pubic bone may be mistaken for a rectal mass
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